Portable braking system



FIG. 1 is a top front perspective view of an embodiment of the portablebraking system;

FIG. 2 is a bottom front perspective view of the portable braking systemof FIG. 1;

FIG. 3 is a top rear perspective view of the portable braking system ofFIG. 1;

FIG. 4 is a bottom rear perspective view of the portable braking systemof FIG. 1;

FIG. 5 is a top plan view of the portable braking system of FIG. 1;

FIG. 6 is a front elevational view of the portable braking system ofFIG. 1;

FIG. 7 is a left side elevational view of the portable braking system ofFIG. 6;

FIG. 8 is a right side elevational view of the portable braking systemof FIG. 6;

FIG. 9 is a rear elevational view of the portable braking system of FIG.1; and,

FIG. 10 is a bottom plan view of the portable braking system of FIG. 1.

The broken lines in the drawings depict unclaimed portions of theportable braking system which form no part of the claimed design.

CLAIM The ornamental design for a portable braking system, as shown anddescribed.